{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,8]],"date-time":"2026-07-08T00:17:27Z","timestamp":1783469847356,"version":"3.55.0"},"reference-count":20,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","issue":"1","license":[{"start":{"date-parts":[[2026,7,1]],"date-time":"2026-07-01T00:00:00Z","timestamp":1782864000000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,7]]},"abstract":"<jats:p>Navigation-assisted contralateral sublaminar decompression using unilateral biportal endoscopy (UBE) offers a facet-preserving strategy for upper lumbar lesions, particularly in young patients in whom minimizing postoperative instability is critical. The authors present the case of a 34-year-old man with left L2\u20133 radiculopathy caused by a cystic lesion extending from the subarticular to the foraminal zone. A navigation-assisted contralateral sublaminar UBE approach was selected to achieve adequate neural decompression while preserving facet integrity. Postoperative imaging confirmed complete lesion removal and satisfactory decompression, with minimal contralateral facet loss on quantitative analysis. This video highlights the technical rationale and clinical utility of this approach.<\/jats:p>\n                  <jats:p>\n                    The video can be found here:\n                    <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"https:\/\/stream.cadmore.media\/r10.3171\/2026.4.FOCVID2624\">https:\/\/stream.cadmore.media\/r10.3171\/2026.4.FOCVID2624<\/jats:ext-link>\n                  <\/jats:p>","DOI":"10.3171\/2026.4.focvid2624","type":"journal-article","created":{"date-parts":[[2026,7,1]],"date-time":"2026-07-01T00:06:41Z","timestamp":1782864401000},"page":"V4","source":"Crossref","is-referenced-by-count":0,"title":["Navigation-assisted contralateral sublaminar decompression: a facet-preserving strategy for upper lumbar lesions"],"prefix":"10.3171","volume":"15","author":[{"given":"Hyun Woong","family":"Mun","sequence":"first","affiliation":[{"name":"Department of Neurosurgery, Spine and Spinal Cord Institute, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dong Ah","family":"Shin","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Spine and Spinal Cord Institute, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Seong","family":"Yi","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Spine and Spinal Cord Institute, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yoon","family":"Ha","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Spine and Spinal Cord Institute, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Keung Nyun","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Spine and Spinal Cord Institute, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chang Kyu","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Spine and Spinal Cord Institute, Severance Hospital, Yonsei University College of Medicine, Seoul, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1754","reference":[{"key":"b1","series-title":"World Neurosurg","first-page":"123939","article-title":"Unilateral biportal endoscopic discectomy via the contralateral sublaminar approach for lumbar disc herniation with very high-grade migration: a technical note and case series","volume":"197","author":"Park YJ","year":"2025","unstructured":"Park YJ, Park MK, Son SK, San Ko Y. Unilateral biportal endoscopic discectomy via the contralateral sublaminar approach for lumbar disc herniation with very high-grade migration: a technical note and case series. World Neurosurg. 2025;197:123939. doi:10.1016\/j.wneu.2025.123939"},{"key":"b2","series-title":"Front Surg","first-page":"959390","article-title":"Contralateral inclinatory approach for decompression of the lateral recess and same-level foraminal lesions using unilateral biportal endoscopy: a technical report","volume":"9","author":"Tian D","year":"2022","unstructured":"Tian D, Zhu B, Liu J,  Contralateral inclinatory approach for decompression of the lateral recess and same-level foraminal lesions using unilateral biportal endoscopy: a technical report. Front Surg. 2022;9:959390. doi:10.3389\/fsurg.2022.959390"},{"issue":"4","key":"b3","series-title":"Neurospine","first-page":"1149","article-title":"O-arm navigation-guided unilateral biportal endoscopic decompression of far-out syndrome","volume":"21","author":"Kavishwar RA","year":"2024","unstructured":"Kavishwar RA, Liang Y, Lee D, Kim J, Pedraza M, Kim JS. O-arm navigation-guided unilateral biportal endoscopic decompression of far-out syndrome. Neurospine. 2024;21(4):1149\u20131153. doi:10.14245\/ns.2449140.570"},{"issue":"suppl 1","key":"b4","series-title":"Neurospine","first-page":"S110","article-title":"Contralateral keyhole biportal endoscopic surgery for ruptured lumbar herniated disc: a technical feasibility and early clinical outcomes","volume":"17","author":"Park JH","year":"2020","unstructured":"Park JH, Jang JW, Park WM, Park CW. Contralateral keyhole biportal endoscopic surgery for ruptured lumbar herniated disc: a technical feasibility and early clinical outcomes. Neurospine. 2020;17(suppl 1):S110\u2013S119. doi:10.14245\/ns.2040224.112"},{"issue":"5","key":"b5","series-title":"Neurosurgery","first-page":"628","article-title":"Relief of lumbar canal stenosis using multilevel subarticular fenestrations as an alternative to wide laminectomy: preliminary report","volume":"23","author":"Young S","year":"1988","unstructured":"Young S, Veerapen R, O\u2019Laoire SA. Relief of lumbar canal stenosis using multilevel subarticular fenestrations as an alternative to wide laminectomy: preliminary report. Neurosurgery. 1988;23(5):628\u2013633. doi:10.1227\/00006123-198811000-00014"},{"key":"b6","series-title":"The Adult Spine: Principles and Practice","first-page":"1821","article-title":"Microsurgical spinal laminotomies","author":"McCulloch JA","year":"1991","unstructured":"McCulloch JA. Microsurgical spinal laminotomies. In: Frymoyer JW, ed.The Adult Spine: Principles and Practice. Raven Press;1991:1821\u20131831."},{"issue":"6","key":"b7","series-title":"Oper Neurosurg","first-page":"621","article-title":"The feasibility and perioperative results of bi-portal endoscopic resection of a facet cyst along with minimizing facet joint resection in the degenerative lumbar spine","volume":"18","author":"Akbary K","year":"2020","unstructured":"Akbary K, Kim JS, Park CW, Jun SG, Hwang IC. The feasibility and perioperative results of bi-portal endoscopic resection of a facet cyst along with minimizing facet joint resection in the degenerative lumbar spine. Oper Neurosurg. 2020;18(6):621\u2013628. doi:10.1093\/ons\/opz262"},{"key":"b8","series-title":"World Neurosurg","first-page":"33","article-title":"Contralateral interlaminar keyhole percutaneous endoscopic lumbar surgery in patients with unilateral radiculopathy","volume":"101","author":"Hwang JH","year":"2017","unstructured":"Hwang JH, Park WM, Park CW. Contralateral interlaminar keyhole percutaneous endoscopic lumbar surgery in patients with unilateral radiculopathy. World Neurosurg. 2017;101:33\u201341. doi:10.1016\/j.wneu.2017.01.079"},{"issue":"8","key":"b9","series-title":"Global Spine J","first-page":"2340","article-title":"Comparative study on accuracy of intra-operative computed tomography-navigation based pedicle screw placement with skin vs bone fixed dynamic reference frame in minimally invasive transforaminal lumbar interbody fusion","volume":"14","author":"Degulmadi D","year":"2024","unstructured":"Degulmadi D, Dave BR, Chauhan V,  Comparative study on accuracy of intra-operative computed tomography-navigation based pedicle screw placement with skin vs bone fixed dynamic reference frame in minimally invasive transforaminal lumbar interbody fusion. 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Raven Press;1991:1821\u20131831."},{"issue":"6","key":"b7","series-title":"Oper Neurosurg","first-page":"621","article-title":"The feasibility and perioperative results of bi-portal endoscopic resection of a facet cyst along with minimizing facet joint resection in the degenerative lumbar spine","volume":"18","author":"Akbary K","year":"2020","unstructured":"Akbary K, Kim JS, Park CW, Jun SG, Hwang IC. The feasibility and perioperative results of bi-portal endoscopic resection of a facet cyst along with minimizing facet joint resection in the degenerative lumbar spine. Oper Neurosurg. 2020;18(6):621\u2013628. doi:10.1093\/ons\/opz262"},{"key":"b8","series-title":"World Neurosurg","first-page":"33","article-title":"Contralateral interlaminar keyhole percutaneous endoscopic lumbar surgery in patients with unilateral radiculopathy","volume":"101","author":"Hwang JH","year":"2017","unstructured":"Hwang JH, Park WM, Park CW. Contralateral interlaminar keyhole percutaneous endoscopic lumbar surgery in patients with unilateral radiculopathy. World Neurosurg. 2017;101:33\u201341. doi:10.1016\/j.wneu.2017.01.079"},{"issue":"8","key":"b9","series-title":"Global Spine J","first-page":"2340","article-title":"Comparative study on accuracy of intra-operative computed tomography-navigation based pedicle screw placement with skin vs bone fixed dynamic reference frame in minimally invasive transforaminal lumbar interbody fusion","volume":"14","author":"Degulmadi D","year":"2024","unstructured":"Degulmadi D, Dave BR, Chauhan V,  Comparative study on accuracy of intra-operative computed tomography-navigation based pedicle screw placement with skin vs bone fixed dynamic reference frame in minimally invasive transforaminal lumbar interbody fusion. 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